Observing

The night sky is always changing. Observers watch planets dance in the evening, stars explode as supernovae, and new comets grace dawn skies. Here we bring together all the stargazing tips and resources you’ll need to see the glories that light up the heavens. Our Sky at a Glance column guides you to the best celestial sights of the week, our astronomy podcast provides a monthly audio tour, and our interactive tools and guides are useful resources to aid your observing at any time.

Time Travel for Skywatchers

Time travel is one of the best things about astronomy. Check out two websites that give skywatchers a more visceral sense of stellar distances and how constellations change shape across the sweep of time.

This Week's Sky at a Glance logo

This Week’s Sky at a Glance, April 20 – 28

Friday, April 20 • This evening the dark limb of the crescent Moon will occult 4th-magnitude multiple star Nu Geminorum, in the feet of Gemini, for parts of the southern U.S. and points south. For rough time estimates at your location, interpolate between the time predictions in the April Sky & Telescope, page 48. Saturday,…

Walking with Arcturus

Stars are time machines that can transport us into the past or future. They can also illuminate our own personal journeys, as Arcturus did for me one night.